Burp Suite quickly and easily detects the XSS issue in DOM-based Cross Site Scripting executed directly in the browser.
Burp Suite's DOM Invader helps you find DOM-based vulnerabilities quickly and specifically. Once you have enabled the Invader: Burp Suite quickly and easily detects the XSS issue in DOM-based Cross Site Scripting executed directly in the browser. The activation itself is simple:
Burp Suite can thus be put directly into operation with just a few steps and clicks. This makes the tool ideally suited for regular use in everyday life. It can thus also be useful for more extensive security tests or as part of a penetration test.
In order to use Burp Suite as you want, you should check the invader settings. To do this, it is enough to look at the Burp Suite icon. It is located in the upper right corner of the browser and can be opened with one click. Through the settings, you also determine how the suite behaves, which allows you to implement different test scenarios.
Burp Suite's Invader is an effective tool when it comes to detecting DOM XSS. Based on the values it sends, you can check it as if it were a reflected XSS. The way it works is simple but effective:
First, load the page you want to test. Then, the Canary is introduced to a general source or a specific query parameter. Using the DevTools embedded in the Burp Suite browser, you open the "Augmented DOM" tab. You will then see all sinks and sources with the Canary value. The display is based on a tree view for all available sources, so it remains clear and you can use it purposefully. Especially helpful: The jobs within the Burp Suite are arranged in descending order - this means you see the most interesting of the entries first.
When you find a relevant entry, you can view the value, as well as the associated stack trace. It can be useful at this point to store additional characters in the URL parameter or another source of the Canary. In this way, you can quickly and easily determine whether the characters are coded correctly.
As soon as you change the page in your browser, for example by redirecting, forwarding or similar, the Canary reloads. This means for you: most of the processes are done automatically and you only have to define a few settings in advance to get meaningful results. The practical listing of the findings in list form also makes them nice and clear.
You will already benefit from the overview provided after a short time. This makes Burp Suite an excellent companion towards more security in your Internet applications. By the way, you can use Burp Suite not only in the corporate environment, even though it is particularly important there: it is also ideally suited for your personal single-page web applications.
Cross site scripting is a type of injection attack, and it is executed client-side. In this process, a malicious script is injected into an otherwise legitimate website and then executed. As soon as the user visits the website with this injected code, the attack begins. As a result, this form of scripting poses a high risk, which Burp Suite is designed to limit.
The good news is that many of the XSS vulnerabilities can be detected with the help of a penetration test. Most of them are found in single-page web applications, where a large part of the business logic is moved to the frontend. This is mostly done in the form of Java scripts, making Scripting Vulnerability one of the most widespread vulnerabilities for web applications. These attack vectors are also increasingly found in API calls, making the vulnerability inherently critical. However, the attack can be executed not only client-side, but also succeeds server-side.
The goal of such an attack is usually to obtain confidential data. It can also cause damage to the system or take over the application completely. This works particularly well because the attack code is located within a supposedly secure context. This makes this method not only popular, but also dangerous.
Incidentally, XSS can be used to fundamentally change Internet pages, allowing the attackers to take control of the browser. Confidential information or passwords that can be read this way are obtained by the cybercriminal without much effort. With Burp Suite, however, these very vulnerabilities can be easily detected.